Anybody have inside information on when USNO astronomical site will come back online? It??s been down for a year.
I had adapted to the USNO??s ephemeris data format for solar/star positions.
I guess it??s a back burner issue.
Just curious if I??m missing some news on it.?ÿ
This is just absolutely unbelievable and reeks of incompetence. Why couldn't they have left everything up while they developed the new system.?ÿ
Larry Scott;?ÿ What type of data were you getting from the USNO (be specific ). Thanks and?ÿHappy Thanksgiving.
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John Nolton
JPL Horizons is the fall back. I??ve noted that Horizon returns about 4? different than USNO, don??t know why, and thst might be insignificant. and Horizon doesn??t include primary navigation stars.
Ive been using USNO for years. For consistency, I??d prefer USNO. But life??s a compromise. And USNO will come back ... in the spring, I assume.
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Right - no stars - forgot about that.?ÿ
Looks like they closed near the end of October.?ÿ
For the price you used to get a CD with PC and MAC versions, and a nice book which details the instructions and examples.?ÿ Although the book was copyrighted by the publishing company, I'm assuming the program was taxpayer funded.?ÿ
Therefore I'm offering a link to the files as copied off the CD by my PC. Hope it works for you. If you need me to look up something in the manual, send me a message.
It will be a few hours before Dropbox finishes sync because I throttle the update rate - my wife needs most of our DSL bandwidth for work.?ÿ So try this maybe after Tuesday 1800Z (afternoon USA time zones).
Dropbox File (Private or Invalid)
ill snag that. How big is it?
The other best source UKHO Ephemeris for Land Surveyors. NP-321. But I can??t seem find the 2021 edition. And UKHO only publishes on CD of DVD. Actually NP321 is a wealth of great information. I had current versions of it 2017-2018. But the US vendors I browsed don??t list 2021 in their catalogs.
How big is it?
~125 megabytes
The MICA file upload is complete.?ÿ Hope it works for you.
I have bought a number of things over the years from Willman-Bell, most recently the Astronomical Almanac for 2020. Their web page is still fully up, but it says they are closed for business. I hope there is someone to take their place with the same good stuff.?ÿ
Hey, I was just working through the lunar azimuth example in your paper!
Thanks for putting that together
Easy button. I have an antique version of ICE and was expecting a primitive interface. But, this serves the purpose and not any seconds different.
Does MICA have Polaris??ÿ
Polaris, 21 other bright stars, planets, ...
MICA has not been updated with current values of Delta T. The star and planet positions should be accurate if calculations are done in TAI (International Atomic Time), which essentially is the independent variable in the equations of motion of the celestial bodies. But, looking at Bulletin A, I believe the Delta T, as of 26 Nov 2020, is 69.005 s while MICA gives it as 71.13 s. So don't work with MICA using UT1, use TAI and do the time conversion yourself.
I pulled what I needed from MICA, but... I still can??t find RA GHA Aries?ÿ